Is this an hdmi cable issue?

Greetings folks! Glad I found your forum.
I have an early LG hdtv 120htz.
I use for movies and net.
In starting up it up with my computer it started power but no image on the hdtv.
I am not even getting a no signal warning on the hdtv.
Someone suggested this could be an hdmi cable issue.
I would greatly appreciate advice if this is an hdmi cable issue.
Love the tv, hate to have it go bad.
thanks in advance for any help,
Lag
(Oh, if I turn the tv on and off it starts up...)

Greetings folks! Glad I found your forum.
I have an early LG hdtv 120htz.
I use for movies and net.
In starting up it up with my computer it started power but no image on the hdtv.
I am not even getting a no signal warning on the hdtv.
Someone suggested this could be an hdmi cable issue.
I would greatly appreciate advice if this is an hdmi cable issue.
Love the tv, hate to have it go bad.
thanks in advance for any help,
Lag
(Oh, if I turn the tv on and off it starts up...)

I would not suspect the cable. But since they are so cheap it's a good idea to get extra and have them on hand. If the set will turn on after, try a hard reset-pull the plug, wait a bit then plug it back in.

I would not suspect the cable. But since they are so cheap it's a good idea to get extra and have them on hand. If the set will turn on after, try a hard reset-pull the plug, wait a bit then plug it back in.

Hey, thanks for the quick reply.
I am trying to use a different hdmi socket on the tv. There are four.
What worries me the most is that the screen will show power is on but I am not getting a 'no signal' warning. It is almost like I am getting a hand shake that just kind of freezes. It then does not want to shift to RBG. Weird. Again, thanks. I will try the hard reset.

If your TV works after some fashion, it isn't a cable issue. In some cases with HDMI, it makes a difference which device is turned on first. It may be that you need to power your source and then the TV to establish a handshake. You'll probably get the same results for all your HDMI inputs.

I unplugged the cables last night and upon turning on the hdtv this morning I got the same thing: a slightly lit screen but did not get a "no signal" sign on the screen. After turning in off and on again I got the "no signal" message on the screen. I don't think this is a cable issue. It appears that something is going bad on the ability of the hdtv to completely turn itself on and read what, if any, type of signal it is getting. Should I post this in another thread? Is my hdtv doomed? I hate to haul it in for repair. I guess I am looking for some hint as to what is going bad with it. It is an LG that has been perfect up to now and is about 4 years old.

I unplugged the cables last night and upon turning on the hdtv this morning I got the same thing: a slightly lit screen but did not get a "no signal" sign on the screen. After turning in off and on again I got the "no signal" message on the screen. I don't think this is a cable issue. It appears that something is going bad on the ability of the hdtv to completely turn itself on and read what, if any, type of signal it is getting. Should I post this in another thread? Is my hdtv doomed? I hate to haul it in for repair. I guess I am looking for some hint as to what is going bad with it. It is an LG that has been perfect up to now and is about 4 years old.

If you are handy, and know a bit about electronics, it would be easy to find the bad part and replace it. Boards are not soldered in anymore. They all have connectors that come out fairly easy.
Diagnose: you should get a blinky lite in front that will blink so many time and is an indicator to tell repair where to look. The net is full of repair tips and videos on youtube. If your the type to fix with a hammer and flatbar, take it in!
IF I can swap out boards, then most people can. And I have 10 thumbs!

Well, I build my own computers. I just never thought much about taking an hdtv apart.
I saw a couple vids and looks fairly easy.
One question: Can you treat the internals of an hdtv like a computer, which is to say there is not much danger in getting shocked. If it is just a circuit board inside, can I simply ground myself when working on it. Funny, I never thought it would be like a plain on circuit board on a computer. Looks simple.

In your original post you mentioned that you start your tv with your computer. Can you please be a bit more specific. Also, what cable boxes, etc. do you have hooked to your tv? Also, before you go digging inside your TV, unplug it for a few hours. Not just the cables, but from it's power supply.

In your original post you mentioned that you start your tv with your computer. Can you please be a bit more specific. Also, what cable boxes, etc. do you have hooked to your tv? Also, before you go digging inside your TV, unplug it for a few hours. Not just the cables, but from it's power supply.